xpcom/io/nsIConverterInputStream.idl

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "nsIUnicharInputStream.idl"
   7
   8 interface nsIInputStream;
   9
  10 /**
  11  * A unichar input stream that wraps an input stream.
  12  * This allows reading unicode strings from a stream, automatically converting
  13  * the bytes from a selected character encoding.
  14  */
  15 [scriptable, uuid(FC66FFB6-5404-4908-A4A3-27F92FA0579D)]
  16 interface nsIConverterInputStream : nsIUnicharInputStream {
  17     /**
  18      * Default replacement char value, U+FFFD REPLACEMENT CHARACTER.
  19      */
  20     const char16_t DEFAULT_REPLACEMENT_CHARACTER = 0xFFFD;
  21
  22     /**
  23      * Special replacement character value that requests errors to
  24      * be treated as fatal.
  25      */
  26     const char16_t ERRORS_ARE_FATAL = 0;
  27
  28     /**
  29      * Initialize this stream.
  30      * @param aStream
  31      *        The underlying stream to read from.
  32      * @param aCharset
  33      *        The character encoding to use for converting the bytes of the
  34      *        stream. A null charset will be interpreted as UTF-8.
  35      * @param aBufferSize
  36      *        How many bytes to buffer.
  37      * @param aReplacementChar
  38      *        The character to replace unknown byte sequences in the stream
  39      *        with. The standard replacement character is U+FFFD.
  40      *        A value of 0x0000 will cause an exception to be thrown if unknown
  41      *        byte sequences are encountered in the stream.
  42      */
  43     void init (in nsIInputStream aStream, in string aCharset,
  44                in long aBufferSize, in char16_t aReplacementChar);
  45 };